There are 1 questions in this calculation: for each question, the 1 derivative of x is calculated.
    Note that variables are case sensitive.
\[ \begin{equation}\begin{split}[1/1]Find\ the\ first\ derivative\ of\ function\ (3x - {x}^{2})(3 - x - {x}^{2})\ with\ respect\ to\ x：\\\end{split}\end{equation} \]\[ \begin{equation}\begin{split}\\Solution:&\\ &Primitive\ function\ = 9x - 6x^{2} - 2x^{3} + x^{4}\\&\color{blue}{The\ first\ derivative\ function：}\\&\frac{d\left( 9x - 6x^{2} - 2x^{3} + x^{4}\right)}{dx}\\=&9 - 6*2x - 2*3x^{2} + 4x^{3}\\=& - 12x - 6x^{2} + 4x^{3} + 9\\ \end{split}\end{equation} \]

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